if you are working on perspective i would make sure snap points isnt on
cause this will snap to grib points so it might look right in perspective but not in plan veiws.
you also get the same problem with the move/scale/rotate setting if you have the reference coordiantion system set to screen or something else than view. btw those setting are just next to the move/scale/rotate tools up the top, its a pull down thing
you can see on the attached file that its set on screen and the move gizmo is all over the place
thats all i can come up with atm
but hey its 4pm i would just clock of work and go home
